Querry: A good solid text on writing Macro Assemblers

[Andrew E Page]

I am looking for a good basic text on the theory and authoring
of Macro Assemblers.  I have several texts on writing compilers
but the need for my current project is a Macro Assembler.

I am also led to understand that there are several products that
are assembler frameworks.  

Any reply via 'r' would be MUCH appreciated.

Many Thanks

-- 
Andrew E. Page (Warrior Poet)   |   Decision and Effort The Archer and Arrow
Concepts Engineering            |     The difference beteween what we are
CIS:70202,234  BIX:page1        |           and what we want to be.